Radiolab: The Soul Patch

We get to know a man who struggles, and mostly fails, to contain
his violent outbursts... until he meets a bird who can keep him in
check. Then, Oliver Sacks and Chuck Close, who are both face-blind,
share workarounds that help them figure out who they're talking to.
And a senior center stumbles upon an unexpected way to help
Alzheimer's patients-by building a bus stop.